OSHA - Occupational Safety & Health Administration
GFCI - A Ground Fault Circuit Interrupter (GFCI) or Residual Current Device (RCD) is a
device that shuts off an electric power circuit when it detects that current is flowing
along an unintended path, such as through water or a person.
RCD - Residual Current Device (RCD) or a Ground Fault Circuit Interrupter (GFCI) is a
device that shuts off an electric power circuit when it detects that current is flowing
along an unintended path, such as through water or a person.
NEMA - National Electric Manufacturers Association
SHW - Service Hot Water - for commercial applications. Water temp can go up to 180
degF for activities like commercial dish washing
,DHW - Domestic Hot Water
OFWH - Oil-Fired Water Heater
OFF - Oil-Fired Furnace
PPM - Parts Per Million
ASHRAE - American Society of Heating, Refrigeration and Air Conditioning Engineers
CH4 - Methane otherwise know as natural gas.
CO - Carbon Monoxide - lethal gas that is a bi-product of combustion. Sign of
incomplete combustion, typically due to insufficient combustion air.
EEM - Energy Efficiency Measure
ECM - Energy Conservation Measure
UST - Underground Storage Tank
Atm - Atmosphere - A unit measure of air pressure, specifically Atmospheric Air
Pressure
ECO - Energy Conservation Opportunity
Pa - Pascals - A unit measure of Air Pressure
VFD - Variable Frequency Drive - a type of control for motors and drives that modulates
the frequency (and this he speed) of a motor, to account for varying loads, and can lead
to significant energy savings (see affinity laws).
PSIG - Pounds Per Square Inch Gage (Unit of Air Pressure)
V (VAC) - Volts (Volts in Alternating Current)
AD / DC - Alternating Current / Direct Current
A (mA) - Amps (Mili-Amps)
W (kW) - Watts (Kilo-Watts)
LF - Load Factor
Wh (kWh) - Watt-Hour (Kilo-Watt Hour)
,HP - Horse Power
Ph - Phases
Hz - Hertz
FLA - Full Load Amperage
RLA - Reduced Load Amperage
HRV - Heat Recovery Ventilation
IAQ - Indoor Air Quality
IEQ - Indoor Environmental Quality
ASTM - American Society for Testing of Materials
NO - Normally Open, a switch contact that is open until operated or energized.
CAR - Constant Air Regulators
ERV - Energy Recovery Ventilation
ACH - Air Changes Per Hour
VOC - Volatile Organic Compounds
CFM - Cubic Feet Per Minute
BAS - Building Airflow Standard
VDR - Vapor Diffusion Retard - a membrane with very low permeability rating ("perm"),
typically below 1 perm.
MVR - Minimum Ventilation Requirement - ventilation standard for RESNET HERS.
Similar to BPI's BAS.
NFRC - National Fenestration Rating Council - body that provides U value ratings for
fenestration (like doors and windows)
OSB - Oriented Strand Board - the material that sheathing is made out of
EER - Energy Efficiency Ratio
, COP - Coefficient of Performance - an efficiency rating used for HVAC equipment,
commonly for heat pumps.
TAB - Test, Adjust and Balance
SHGC - Solar Heat Gain Coefficient
SEER - Seasonal Energy Efficiency Rating
HSPF - Heating Seasonal Performance Factor -an efficiency rating used for HVAC
equipment, commonly for the heating side of heat pumps.
BTU (BTU/H) - British Thermal Unit (British Thermal Unit Per Hour)
MMBTU - 1 Million BTUs
MBH - 1 Thousand BTUs Per Hour
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